Experiment on mechanical properties of mental rubber bearing(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2019年04期
- Page:
- 92-99
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Experiment on mechanical properties of mental rubber bearing
- Author(s):
- XIA Xiushen1; ZHANG Yingzhou1; 2; CHEN Xingchong1; LI Jianzhong3; TANG Jingyao1
- (1. School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China; 2. Key Laboratory of Highway Network Monitoring in Gansu Province, Gansu Hengda Road and Bridge Group Co., Ltd., Lanzhou 730070, Gansu, China; 3. School of Civil Engineering, Tongji University, Shanghai 200092, China)
- Keywords:
- bridge engineering; bridge bearing; metal rubber; mechanical property experiment; seismic response
- PACS:
- -
- DOI:
- -
- Abstract:
- To test the mechanical properties of metal rubber bearings and assess whether they meet the requirements of bridge bearings, a compression experiment, rotation experiment, and a shaking table test were studied. The vertical force and displacement curve of the bearings was obtained through the compression experiment under different loads. The relationship between the tangent modulus was obtained by fitting and deriving the stress and strain curve using the MATLAB platform. The mathematical expression of the tangent modulus was constructed，and based on this, the computational formula of the bearings for the vertical stiffness and force was deduced. Considering the bearing vertical stress, metal rubber bearing rotational experiments were performed to obtain the rotational moment and angle curve of the bearings. Shaking table tests were conducted on the bridge models with metal rubber bearings, the displacement and acceleration of each important point were obtained, and the results were compared to those of laminated rubber bearings， whose dimensions were similar to those of the metal rubber bearings. The results show that the vertical force and displacement relationship curve of the metal rubber bearings have obvious nonlinear characteristics. The vertical capacity of the metal rubber bearings can meet the service requirements of smallspan and mediumspan highway bridge bearings. The tangent modulus of the bearing is an approximately linear function related to stress and the calculation formula of the vertical stiffness agrees well with the experimental results. The stiffness calculation formula can be used to determine the key technical parameters of the metal rubber bearings in the initial design. The rotational stiffness of the bearings is linear with its design stress, The influence of vertical stress on the rotational stiffness of the bearing should be considered in the design and calculation of bearing and bridge. Metal rubber bearings have good damping and vibration isolation performance. 3 tabs, 15 figs, 25 refs.
Last Update: 2019-07-29